CVE-2018-12393
UnknownEPSS 3.92%
Last modified
CVE-2018-12393 is a vulnerability of currently unknown severity. A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. EPSS estimates a 3.92% chance of exploitation in the next 30 days.
Description
A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. *Note: 64-bit builds are not vulnerable to this issue.*. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 63.0 |
| Mozilla | Firefox Esr | < 60.3 |
| Mozilla | Thunderbird | < 60.3 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 18.10 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Server Aus | 7.6 |
| Redhat | Enterprise Linux Server Eus | 7.6 |
| Redhat | Enterprise Linux Server Tus | 7.6 |
| Redhat | Enterprise Linux Workstation | 6.0 |
| Redhat | Enterprise Linux Workstation | 7.0 |
References
- http://www.securityfocus.com/bid/105718Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/105769Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041944Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3005Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3006Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3531Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3532Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1495011Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00008.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201811-04Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3801-1/Third Party Advisory
- https://usn.ubuntu.com/3868-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4324Third Party Advisory
- https://www.debian.org/security/2018/dsa-4337Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-26/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-27/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-28/Vendor Advisory
- http://www.securityfocus.com/bid/105718Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/105769Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041944Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3005Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3006Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3531Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3532Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1495011Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00008.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201811-04Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3801-1/Third Party Advisory
- https://usn.ubuntu.com/3868-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4324Third Party Advisory
- https://www.debian.org/security/2018/dsa-4337Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-26/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-27/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-28/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-12393?
A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. *Note: 64-bit builds are not vulnerable to this issue.*. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.
How severe is CVE-2018-12393?
Severity scoring for CVE-2018-12393 is pending analysis. The EPSS model estimates a 3.92% probability of exploitation in the next 30 days.
How do I fix CVE-2018-12393?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2018-12393?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST